Marginal breakdown of the Fermi-liquid state on the border of metallic ferromagnetism

R. P. Smith (), M. Sutherland, G. G. Lonzarich, S. S. Saxena, N. Kimura, S. Takashima, M. Nohara and H. Takagi
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R. P. Smith: Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, UK
M. Sutherland: Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, UK
G. G. Lonzarich: Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, UK
S. S. Saxena: Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, UK
N. Kimura: Center for Low Temperature Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
S. Takashima: University of Tokyo, Kashiwa, Chiba 277-8561, Tokyo, Japan
M. Nohara: University of Tokyo, Kashiwa, Chiba 277-8561, Tokyo, Japan
H. Takagi: University of Tokyo, Kashiwa, Chiba 277-8561, Tokyo, Japan

Nature, 2008, vol. 455, issue 7217, 1220-1223

Abstract: Fermi liquids and metallic ferromagnetism The low-temperature properties of conventional metals are well described by Fermi liquid theory, which treats electrons as a gas of scattering but otherwise non-interacting entities. But increasingly, examples of metallic systems are being found in which Fermi liquid theory breaks down, often in mysterious ways. Smith et al. describe one such example in which non-Fermi liquid properties can be attributed to a specific process — the long-range interactions between the electronic spins in a metal on the verge of becoming magnetic. Such a system is known as a 'marginal' Fermi liquid, and provides a conceptual link between classical metals and more exotic non-Fermi systems.

Date: 2008
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DOI: 10.1038/nature07401

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